ZELUS. 251 
ZELUS. 
Zelus, Fabricius, Syst. Rhyng. p. 281 (1803) (part.) ; Stal, Enum. Hemipt. ii. pp. 70, 88. 
Euagoras, Burmeister, Handb. der Ent. ii. p. 226 (1839) (part.). 
Evagoras, Amyot et Serville, Hist. Nat. Ins. Hémipt. p. 368 (1843). 
Diplodus, Amyot et Serville, loc. cit. p. 370; Stal, Ofv. Vet.-Ak. Férh. 1866, p- 296. 
Pindus, Stal, Stett. ent. Zeit. 1862, p. 454 ; Ofv. Vet.-Ak. Férh. 1866, p. 296. 
An American genus, as restricted by Stal, ranging from Canada to the Argentine 
Republic, but chiefly confined to the tropics. Lethierry and Severin enumerate fifty- 
two species as belonging to it, but several of the names represent nothing more than 
varieties. Eighteen species are here recorded from within our limits, eight of these 
being treated as new. Some of them are extremely variable in colour, and one of the 
characters used by Stal, viz. the relative length of the basal joint of the antenne, 
cannot be depended upon. The males of most of the species have the third antennal 
joint thickened, and the last genital segment armed with a process or spine at the apex. 
The females in some cases have the hind tibie swollen on the inner side below the 
base (Z. janus), and in others the intermediate femora are slightly modified in form 
(Z. inconstans and Z. fasciatus). The species of this genus may be easily separated 
from the numerous allied forms by the elongate second joint of the rostrum. 
a. Lateral angles and disc of the pronotum unarmed. ([Zetus, Fabr., 
Stal.] 
a’, Body more or less robust. 
a’, Legs moderately slender. 
a’/’, Pronotum with a single black patch on the disc; femora with 
two stramineous rings, those on the anterior pair sometimes 
obsolete. . . . . ~~ . . . . « rubidus, Lep. 
6’. Pronotum with three black patches on the dise ; intermediate 
and hind femora with a single stramineous ring. . . . . ¢rimaculatus, n. sp. 
6’. Legs very slender; pronotum variable in colour, the femora more 
or less annulated with flavous . . . . .. . . . . .« %eonstans, n. sp. 
b. ney narrow. 
. Head elongate, gradually narrowed towards the base. 
c’’. Legs speckled and annulated with black . . . . . . . . pictipes, n. sp. 
d’’, Legsentirely pale . . 2... . 1. wu - . . cervicalis, Stal. 
d’’, Head comparatively short, strongly narrowed towards the base ; 
legs pale . . . . . soe ew eee . » pallens, H.-S. 
b. Lateral angles of the pronotum armed with a spine or tooth, the disc 
unarmed. [DipLtopvus, Amy. et Serv.] 
’, Head rufous or sanguineous; the pronotum with one or two trans- 
verse black fascie. 
e’’, Body more or less robust ; legs partly testaceous or sanguineous. 
e’’, Lateral spines of the pronotum sharp; femora testaceous at 
the base. 2. 2 2. ee eww ww ee  rusficeps, Stal. 
32* 
